STUDIES ON FERMEiNTATION. 



101 



a few da5^s will have become perceptibly heavier. In dis- 

 tilling the subjacent liquid, however, we shall generally find 

 that it contains no alcohol at all, even though the weight of the 

 plant be half a gramme, or more (6 or 7 grains). 



These results apply to all the fungoid growths that we have 

 studied, but they vary considerably with the nature of the 

 organisms. Aspergillus glaucus is, in this respect, one of the 

 most curious. 



On June 15th, 1873, we impregnated three flasks of wort, 

 A, B, C, with pure spores of aspergillm glaucus. The development 

 was rapid and the fructification abundant. On June 20th, we 

 shook up the liquid and the supernatant fungoid growths in 

 the three flasks ; the flasks A and B were then treated as 

 follows : — 



"We distilled the liquid in A to discover the presence of 

 alcoholj but could find none. 



HE: 



'IIIIHlhllllilllll'lllillllllHliiihll.l'i 



Fig. 19. 



The flask B was connected with a test flask (Fig. 19), into 

 which the liquid, together with its fungoid growth, was trans- 

 ferred from B. The next day, June 21st, the mycelium which 



